It asks how’s it possible that the iPhone can be bigger, but also smaller - referring to the bigger screen of the device and its thinner form factor.
这则广告提出iPhone如何在变大的同时变小的疑问，此话指的就是iPhone 5的屏幕变大了，而机身却变薄了。
广告词：
There are laws to physics, right? So explain this, how can something get bigger, and smaller? There’s more of it, and less of it. Well, I guess the laws of physics are more like, general guidelines.